Sandbox Dreams

My dream sandbox MMO experience would be Eve Online in a medieval setting. I want to build castles with my guild and help defend them against other guilds who are attacking them with siege equipment that they built. No magic, absolutely zero. No elves, no orcs, just humans and CONFLICT. Real, organic conflict – not the flimsy kind in theme park games where you just zone into an instance and attack people because their health bar is red. I mean the kind of conflict that can only arise in a sandbox setting – let us fight over resources.